<div class="parent_div">
  <p>父组件</p>
  <p>{{childInfo}}</p>
  <div>
    <input type="button" value="调用子组件方法" (click)="chiden.fun1()">
    <input type="button" value="调用子组件属性" (click)="getChildInfo(chiden.childInfo)">
  </div>
  <!---子组件指令 start-->
  <app-childen3 #chiden></app-childen3>
  <!---子组件指令 end-->
</div>
